Fig. 1: Schematic illustration of the water-induced Mg passivation and design concept of waterproof Mg electrode by pencil drawing. | Nature Communications

Fig. 1: Schematic illustration of the water-induced Mg passivation and design concept of waterproof Mg electrode by pencil drawing.

From: Toward waterproof magnesium metal anodes by uncovering water-induced passivation and drawing water-tolerant interphases

Fig. 1

a Pristine Mg electrode. Due to the high hydrophilicity, Mg metal is subject to intense water invasion and side effects of gas production, resulting in the formation of a surface passivation layer consisting of Mg(OH)2, MgO, and MgH2 that blocks Mg2+ transport on the anode surface. b PDG-Mg electrode. Benefiting from the inherent hydrophobicity, high conductivity, and rapid Mg2+ diffusivity, the PDG protective layer not only protects the Mg foil from side reactions related to water but also promotes fast and uniform Mg2+ transport during electrochemical cycling.

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